Vintage Products

Re: Beovox M70 Rescue & Adoption

Rich — Thu, 03 Nov 2011 15:53:12 GMT

Martin mentioned many, many posts ago the woofer had changed starting with serial number X.

Re: Beovox M70 Rescue & Adoption

tournedos — Wed, 02 Nov 2011 15:57:25 GMT

Seas 25 F-EWX? I dunno if that's the original woofer for these, but it's a respectable driver. I had those in a self-made pair of huge floor speakers more than 20 years ago. The surround is definitely rubber.

Unfortunately they are not available new any more. I think I would try to fix that cone with coffee filter / tea bag paper and some hobby glue diluted with water to keep the weight down... and of course you need to keep the frets on after that.

Re: Beovox M70 Rescue & Adoption

Rich — Wed, 02 Nov 2011 10:03:45 GMT

I don't have my parts list with me as I'm on a business trip, but the woofer looks the same as mine, and the part number doesn't look out of whack. I have used a small amount of cyanoacrylate hobby glue on woofer rubber surrounds to fix puncture wounds similar to your "cracks." As far as the paper goes, does the "gouge" penetrate all the way through the paper? If not, perhaps best to leave it alone. If yes, well, I've never made that kind of repair before.

What you don't want to do, in theory I guess, is change the mass or stiffness of the cone. Changing and/or adding material to the cone will do just that. Maybe a tiny amount of rice paper and PVA glue on the back?

Re: Beovox M70 Rescue & Adoption

Hadafakaya — Mon, 31 Oct 2011 16:28:22 GMT

As far as being original ? these are "made in Scandanavia -quality SEAS speakers". Also the connectors on the back are missing but the main concern is getting the live back in this speaker. The tweeters and mids all powered up and seemed to work fine.

Re: Beovox M70 Rescue & Adoption

Hadafakaya — Mon, 31 Oct 2011 16:20:29 GMT

This shows a couple cracks and the gouge in the cone. I was thinking rubber cement for the ring and some kind of paper patch for the cone. The other unit is ok. I had the back off of one because the previous owner had it on upside down. I did not have a good look inside. More may be revealed. I put the back on correctly and hooked them to a ONKYO TX 4500 mk II and ran through some FM radio.

Re: Beovox M70 Rescue & Adoption

Rich — Mon, 31 Oct 2011 15:26:39 GMT

Very bright? Neither of my pairs have ever sounded bright to my ears. Quite the opposite, actually. A bit "too mellow" at times, especially the restored pair driven by my Beomaster 4000.

Have you taken a peak inside yet? The back comes off with 8 screws or so.

And do post pictures if you want the best help.

PS "Grills" are usually called "frets" on this forum. I wonder what the Europeans call the frets of a guitar neck....

Re: Beovox M70 Rescue & Adoption

Hadafakaya — Mon, 31 Oct 2011 15:14:19 GMT

My bad- They are rubber not foam. Grills are missing. They actually soundrd ok under low volume. Very bright. I hooked them to an ONKYO TX-4500. I am in Massachusetts, in that humble nation bordering the south of Canada.

Re: Beovox M70 Rescue & Adoption

Steffen — Sun, 30 Oct 2011 21:17:13 GMT

Hadafakaya:
The foam rings on the 10" woofers have a few cracks and the domes on the 5" are depressed. Also a bad tear like on the cone may need a glue job. . Where is the best source for the 10" foam or rubber rings?

I have never seen foam rings on the M70's... Are You sure it's the original woofers..?
The later M75's did have the foam-rings.

Re: Beovox M70 Rescue & Adoption

Rich — Sun, 30 Oct 2011 19:23:40 GMT

Welcome to Beoworld! Good luck with your project.

There are many sources of replacement foam. I've used Woofer Repair for CX50s and S40s, but not M70s. My two pairs of M70s both have rubber surrounds on the woofers.

Where are you located? Whether you're in the US, Europe, or elsewhere, will probably determine where you will source your repair materials.

Post some pictures, those always help those who will try to help you.

Re: Beovox M70 Rescue & Adoption

Hadafakaya — Sun, 30 Oct 2011 15:08:59 GMT

Rich and everyone on this thread Thank You so much for the inspiration to attempt a fixup on a pair of M 70s I rescued from the town dump free shop. The foam rings on the 10" woofers have a few cracks and the domes on the 5" are depressed. Also a bad tear like on the cone may need a glue job. . Where is the best source for the 10" foam or rubber rings?

Thanks, Mike

Re: Beovox M70 Rescue & Adoption

Rich — Wed, 08 Jun 2011 19:02:14 GMT

And a front view.

Well, I guess that concludes the work on this pair of M70s. Thanks for reading. See you around the forums.

Re: Beovox M70 Rescue & Adoption

Rich — Wed, 08 Jun 2011 18:56:59 GMT

And the left channel. I waxed the stands, also, but not the rack as yet.

Re: Beovox M70 Rescue & Adoption

Rich — Wed, 08 Jun 2011 18:55:49 GMT

After waxing different angle, now inside.

The photographs don't show very well how the waxing made the darker one a little lighter, and the lighter one a little darker. The waxing definitely made the pair a closer match. So, mission accomplished.

Re: Beovox M70 Rescue & Adoption

Rich — Wed, 08 Jun 2011 18:51:06 GMT

After waxing.

Re: Beovox M70 Rescue & Adoption

Rich — Wed, 08 Jun 2011 18:49:29 GMT

Before waxing.